442 
J. C. ARTHUR 
Telia hypophyllous, scattered, round, 0.1-0.3 mm. across, early 
naked, compact, dark chocolate-brown, ruptured epidermis incon- 
spicuous; teliospores obovoid or ellipsoid, 19-21 by 24-31 /jl, rounded 
at both ends; wall dark chestnut-brown, thick, 2-2.5 M» thicker above 
up to 5 jjL, closely and finely verrucose ; pedicel colorless, once to once 
and a half length of spore. 
This rust differs from Uromyces Mucimae Rab. in its larger uredin- 
iospores and teliospores, and in the absence of uredinial paraphyses. 
Part of the original collection of Uredo mucunicola P. Henn. in the 
possession of the writer has yielded a few teliospores, which show it to 
be identical with Uromyces Mucunae Rab., for which it should be en- 
tered as a synonym. 
84. Uromyces Indigoferae Diet. & Holw. (on Fabaceae). 
Indigofera mucronata Spreng. 
The species was collected by Kellerman, at Gualan, Dept. Zacapa, 
Dec. 28, 1905, II, 5444, and reported by Kern in Journ. Myc. /. c. 
The species is known from central Texas, southward through Mexico, 
but is not often collected. 
85. Uromyces proeminens (DC.) Pass, (on Euphorbiaceae). 
Chamaesyce hrasiliensis (Lam.) Small {Euphorbia hrasiliensis Lam.), 
Retalhuleu, Feb. 26, 1916, II, III, 5jj. 
Chamaesyce hirta (L.) Millsp. {Euphorbia hirta L.), Solola, Jan. 28, 
1915, I, ii, 142; Sanarate, Dept. Guatemala, Feb. 10, 1916, I, II, 
477- 
The species is a common long-cycle form. It was collected by 
Kellerman on C. adenoptera (Bertol) Small, at Los Amates, Dept. 
Izabel, Jan. 5, 1908, II, III, 7036, and on C. lasiocarpa (Klotsch) 
Arth., Laguna, Lake Amatitlan, Jan. 17, 1906, II, III, 5404, both re- 
ported by Kern in Mycologia /. c, and on C. brasiliensis, at Laguna, 
Lake Amatitlan, Feb. 8, 1905, II, III, 5341. 
The species was also detected in the Field Museum, on a phaner- 
ogamic specimen of Eumecanthus gramineus (Jacq.) Millsp. {Euphorbia 
graminea Jacq.), sheet no. 247010, collected at Agua Caliente, June 2, 
1909, by C. C. Deam, 6137. Only uredinia were present. 
86. Uromyces Oaxacanus Diet. & Holw. (on Euphorbiaceae). 
Jatropha urens L., Guatemala City, Dec. 31, 1914, II, iii, 2. 
A species heretofore known only from southern Mexico has not 
been found showing pycnia. It is doubtful if aecia occur. 
